Its actually a standard screw supercharger with a well thoughtout very integrated intercooler. They increased the cylinder wall size to handle the pressure hence going from 7.0 to 6.2.
I've never seen an engine design where they cover the supercharger is covered by the engine shroud. The "I wanna see da blower!!" loyalist can get upset all they want. To me this is ingenious and modern!
Ls9 - Jalopnik
I can't express enough on how happy I am to see this type of innovation comming from an American auto company. It was frustrating to see the cheap plastic interiors with unshaved moldings (ex. Dodge) and old uncompetitive technology just to please loyalists who don't even by the cars.
I see only a small handfull of folks swaping it out for a turbo as removing the s/c from that engine doesn't look worthwhile and beneficial. They'll do it just to say they did.
Most likely people will just decrease pulley sizes.
EDIT: Doh! I only read page 1. Well, the link is still useful
